A cohesive approach to thin-shell fracture and fragmentation
We develop a finite-element method for the simulation of dynamic fracture and fragmentation of thin-shells. The shell is spatially discretized with subdivision shell elements and the fracture along the element edges is modeled with a cohesive law. In order to follow the propagation and branching of cracks, subdivision shell elements are pre-fractured ab initio and the crack opening is constrained prior to crack nucleation. This approach allows for shell fracture in an in-plane tearing mode, a shearing mode, or a bending of hinge mode. The good performance of the method is demonstrated through the simulation of petalling failure experiments in aluminum plates.
© 2005 Elsevier. Received 15 January 2004, Revised 9 March 2004, Accepted 20 July 2004, Available online 28 January 2005. The support of DoE through Caltech's ASCI Center for the Simulation of the Dynamic Response of Materials (DOE W-7405-ENG-48, B523297) is gratefully acknowledged. MO is also grateful for partial support from the Office of Naval Research through grant N00014-96-1-0068.